./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-properties/simple_built_from_end.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5412fb5-45c1-4b58-b3cc-47a23d42f205/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5412fb5-45c1-4b58-b3cc-47a23d42f205/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5412fb5-45c1-4b58-b3cc-47a23d42f205/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5412fb5-45c1-4b58-b3cc-47a23d42f205/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-properties/simple_built_from_end.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5412fb5-45c1-4b58-b3cc-47a23d42f205/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5412fb5-45c1-4b58-b3cc-47a23d42f205/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0eb3d3e07cae1efa9dc9af5091aea6a309746434756c62bcf3ece83b84aec27a --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 20:20:01,238 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 20:20:01,241 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 20:20:01,290 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 20:20:01,291 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 20:20:01,295 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 20:20:01,297 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 20:20:01,300 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 20:20:01,303 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 20:20:01,307 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 20:20:01,308 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 20:20:01,309 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 20:20:01,310 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 20:20:01,311 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 20:20:01,312 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 20:20:01,314 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 20:20:01,315 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 20:20:01,316 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 20:20:01,318 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 20:20:01,320 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 20:20:01,322 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 20:20:01,323 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 20:20:01,325 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 20:20:01,326 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 20:20:01,329 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 20:20:01,330 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 20:20:01,330 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 20:20:01,331 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 20:20:01,332 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 20:20:01,333 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 20:20:01,333 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 20:20:01,334 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 20:20:01,335 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 20:20:01,336 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 20:20:01,337 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 20:20:01,337 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 20:20:01,338 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 20:20:01,338 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 20:20:01,338 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 20:20:01,339 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 20:20:01,340 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 20:20:01,341 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5412fb5-45c1-4b58-b3cc-47a23d42f205/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 20:20:01,366 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 20:20:01,366 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 20:20:01,367 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 20:20:01,367 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 20:20:01,368 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 20:20:01,368 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 20:20:01,368 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 20:20:01,368 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 20:20:01,369 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 20:20:01,369 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 20:20:01,369 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 20:20:01,369 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 20:20:01,369 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 20:20:01,370 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 20:20:01,370 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 20:20:01,370 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 20:20:01,370 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 20:20:01,370 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 20:20:01,371 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 20:20:01,371 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 20:20:01,372 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 20:20:01,372 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 20:20:01,372 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 20:20:01,372 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 20:20:01,372 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 20:20:01,372 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 20:20:01,373 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 20:20:01,373 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 20:20:01,373 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 20:20:01,373 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 20:20:01,374 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 20:20:01,374 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 20:20:01,374 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:20:01,374 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 20:20:01,374 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 20:20:01,375 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 20:20:01,375 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 20:20:01,375 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 20:20:01,375 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 20:20:01,375 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 20:20:01,376 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 20:20:01,376 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5412fb5-45c1-4b58-b3cc-47a23d42f205/bin/utaipan-eEHZpOm5b7/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5412fb5-45c1-4b58-b3cc-47a23d42f205/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0eb3d3e07cae1efa9dc9af5091aea6a309746434756c62bcf3ece83b84aec27a [2021-11-25 20:20:01,630 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 20:20:01,659 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 20:20:01,662 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 20:20:01,663 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 20:20:01,664 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 20:20:01,665 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5412fb5-45c1-4b58-b3cc-47a23d42f205/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/list-properties/simple_built_from_end.i [2021-11-25 20:20:01,751 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5412fb5-45c1-4b58-b3cc-47a23d42f205/bin/utaipan-eEHZpOm5b7/data/09ed6b7d6/14d3e90b3c324b3c8c2398d02c1566ea/FLAG9f84ff487 [2021-11-25 20:20:02,333 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 20:20:02,334 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5412fb5-45c1-4b58-b3cc-47a23d42f205/sv-benchmarks/c/list-properties/simple_built_from_end.i [2021-11-25 20:20:02,347 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5412fb5-45c1-4b58-b3cc-47a23d42f205/bin/utaipan-eEHZpOm5b7/data/09ed6b7d6/14d3e90b3c324b3c8c2398d02c1566ea/FLAG9f84ff487 [2021-11-25 20:20:02,601 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5412fb5-45c1-4b58-b3cc-47a23d42f205/bin/utaipan-eEHZpOm5b7/data/09ed6b7d6/14d3e90b3c324b3c8c2398d02c1566ea [2021-11-25 20:20:02,603 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 20:20:02,604 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 20:20:02,607 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 20:20:02,608 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 20:20:02,611 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 20:20:02,612 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:20:02" (1/1) ... [2021-11-25 20:20:02,613 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d2a36d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:20:02, skipping insertion in model container [2021-11-25 20:20:02,613 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:20:02" (1/1) ... [2021-11-25 20:20:02,619 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 20:20:02,670 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:20:02,993 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5412fb5-45c1-4b58-b3cc-47a23d42f205/sv-benchmarks/c/list-properties/simple_built_from_end.i[23125,23138] [2021-11-25 20:20:02,997 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:20:03,005 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 20:20:03,043 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5412fb5-45c1-4b58-b3cc-47a23d42f205/sv-benchmarks/c/list-properties/simple_built_from_end.i[23125,23138] [2021-11-25 20:20:03,045 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:20:03,079 INFO L208 MainTranslator]: Completed translation [2021-11-25 20:20:03,079 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:20:03 WrapperNode [2021-11-25 20:20:03,080 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 20:20:03,081 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 20:20:03,081 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 20:20:03,081 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 20:20:03,088 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:20:03" (1/1) ... [2021-11-25 20:20:03,101 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:20:03" (1/1) ... [2021-11-25 20:20:03,120 INFO L137 Inliner]: procedures = 124, calls = 12, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 43 [2021-11-25 20:20:03,121 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 20:20:03,122 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 20:20:03,122 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 20:20:03,122 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 20:20:03,130 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:20:03" (1/1) ... [2021-11-25 20:20:03,131 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:20:03" (1/1) ... [2021-11-25 20:20:03,134 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:20:03" (1/1) ... [2021-11-25 20:20:03,134 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:20:03" (1/1) ... [2021-11-25 20:20:03,140 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:20:03" (1/1) ... [2021-11-25 20:20:03,144 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:20:03" (1/1) ... [2021-11-25 20:20:03,146 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:20:03" (1/1) ... [2021-11-25 20:20:03,148 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 20:20:03,149 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 20:20:03,150 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 20:20:03,150 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 20:20:03,151 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:20:03" (1/1) ... [2021-11-25 20:20:03,159 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:20:03,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5412fb5-45c1-4b58-b3cc-47a23d42f205/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:20:03,184 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5412fb5-45c1-4b58-b3cc-47a23d42f205/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 20:20:03,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5412fb5-45c1-4b58-b3cc-47a23d42f205/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 20:20:03,240 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 20:20:03,240 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 20:20:03,240 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 20:20:03,240 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 20:20:03,240 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 20:20:03,241 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 20:20:03,241 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 20:20:03,241 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 20:20:03,242 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 20:20:03,356 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 20:20:03,358 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 20:20:03,512 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 20:20:03,530 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 20:20:03,531 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-25 20:20:03,533 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:20:03 BoogieIcfgContainer [2021-11-25 20:20:03,533 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 20:20:03,535 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 20:20:03,535 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 20:20:03,539 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 20:20:03,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:20:02" (1/3) ... [2021-11-25 20:20:03,540 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43c394f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:20:03, skipping insertion in model container [2021-11-25 20:20:03,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:20:03" (2/3) ... [2021-11-25 20:20:03,541 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43c394f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:20:03, skipping insertion in model container [2021-11-25 20:20:03,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:20:03" (3/3) ... [2021-11-25 20:20:03,543 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_built_from_end.i [2021-11-25 20:20:03,549 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 20:20:03,549 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 20:20:03,604 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 20:20:03,612 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 20:20:03,612 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 20:20:03,628 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:20:03,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-25 20:20:03,635 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:20:03,635 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-25 20:20:03,636 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:20:03,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:20:03,643 INFO L85 PathProgramCache]: Analyzing trace with hash 74567963, now seen corresponding path program 1 times [2021-11-25 20:20:03,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:20:03,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905613284] [2021-11-25 20:20:03,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:20:03,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:20:03,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:20:03,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:20:03,808 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:20:03,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905613284] [2021-11-25 20:20:03,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905613284] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:20:03,810 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:20:03,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 20:20:03,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059710222] [2021-11-25 20:20:03,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:20:03,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-25 20:20:03,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:20:03,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-25 20:20:03,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 20:20:03,852 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:20:03,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:20:03,876 INFO L93 Difference]: Finished difference Result 17 states and 22 transitions. [2021-11-25 20:20:03,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-25 20:20:03,879 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-25 20:20:03,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:20:03,887 INFO L225 Difference]: With dead ends: 17 [2021-11-25 20:20:03,887 INFO L226 Difference]: Without dead ends: 9 [2021-11-25 20:20:03,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 20:20:03,894 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:20:03,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:20:03,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-11-25 20:20:03,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-11-25 20:20:03,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:20:03,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-11-25 20:20:03,928 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 5 [2021-11-25 20:20:03,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:20:03,928 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-11-25 20:20:03,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:20:03,929 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2021-11-25 20:20:03,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-25 20:20:03,929 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:20:03,929 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-25 20:20:03,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 20:20:03,930 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:20:03,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:20:03,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1997841778, now seen corresponding path program 1 times [2021-11-25 20:20:03,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:20:03,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206070828] [2021-11-25 20:20:03,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:20:03,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:20:03,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:20:04,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:20:04,039 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:20:04,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206070828] [2021-11-25 20:20:04,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206070828] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:20:04,040 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:20:04,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 20:20:04,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404843525] [2021-11-25 20:20:04,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:20:04,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:20:04,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:20:04,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:20:04,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:20:04,043 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:20:04,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:20:04,072 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2021-11-25 20:20:04,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:20:04,074 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-25 20:20:04,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:20:04,074 INFO L225 Difference]: With dead ends: 18 [2021-11-25 20:20:04,075 INFO L226 Difference]: Without dead ends: 12 [2021-11-25 20:20:04,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:20:04,078 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 1 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:20:04,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 14 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:20:04,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-11-25 20:20:04,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2021-11-25 20:20:04,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:20:04,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-11-25 20:20:04,083 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 6 [2021-11-25 20:20:04,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:20:04,084 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-11-25 20:20:04,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:20:04,084 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-11-25 20:20:04,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-25 20:20:04,085 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:20:04,085 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:20:04,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 20:20:04,086 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:20:04,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:20:04,087 INFO L85 PathProgramCache]: Analyzing trace with hash -106563549, now seen corresponding path program 1 times [2021-11-25 20:20:04,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:20:04,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066076674] [2021-11-25 20:20:04,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:20:04,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:20:04,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:20:04,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:20:04,213 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:20:04,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066076674] [2021-11-25 20:20:04,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066076674] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:20:04,216 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:20:04,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:20:04,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158246554] [2021-11-25 20:20:04,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:20:04,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:20:04,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:20:04,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:20:04,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:20:04,219 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:20:04,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:20:04,277 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2021-11-25 20:20:04,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:20:04,279 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-25 20:20:04,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:20:04,280 INFO L225 Difference]: With dead ends: 17 [2021-11-25 20:20:04,280 INFO L226 Difference]: Without dead ends: 15 [2021-11-25 20:20:04,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:20:04,283 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 2 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:20:04,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 18 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:20:04,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-25 20:20:04,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 13. [2021-11-25 20:20:04,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:20:04,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-11-25 20:20:04,294 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2021-11-25 20:20:04,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:20:04,295 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-11-25 20:20:04,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:20:04,295 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-11-25 20:20:04,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-25 20:20:04,296 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:20:04,296 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:20:04,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 20:20:04,296 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:20:04,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:20:04,297 INFO L85 PathProgramCache]: Analyzing trace with hash -649059074, now seen corresponding path program 1 times [2021-11-25 20:20:04,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:20:04,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623435247] [2021-11-25 20:20:04,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:20:04,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:20:04,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:20:04,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:20:04,494 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:20:04,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623435247] [2021-11-25 20:20:04,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623435247] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:20:04,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429564885] [2021-11-25 20:20:04,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:20:04,495 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:20:04,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5412fb5-45c1-4b58-b3cc-47a23d42f205/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:20:04,511 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5412fb5-45c1-4b58-b3cc-47a23d42f205/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:20:04,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5412fb5-45c1-4b58-b3cc-47a23d42f205/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 20:20:04,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:20:04,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-25 20:20:04,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:20:04,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:20:04,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:20:04,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-11-25 20:20:04,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-11-25 20:20:04,994 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:20:04,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:20:05,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:20:05,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429564885] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:20:05,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [395354973] [2021-11-25 20:20:05,117 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 20:20:05,117 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:20:05,122 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:20:05,128 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:20:05,129 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:20:05,224 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 20:20:05,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 41 [2021-11-25 20:20:05,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 20:20:05,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:05,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-11-25 20:20:05,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:05,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:05,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 28 [2021-11-25 20:20:05,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:05,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-11-25 20:20:05,420 INFO L354 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2021-11-25 20:20:05,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2021-11-25 20:20:05,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2021-11-25 20:20:05,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:05,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 230 treesize of output 218 [2021-11-25 20:20:05,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:20:05,591 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-25 20:20:05,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 228 treesize of output 227 [2021-11-25 20:20:05,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:05,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 296 treesize of output 284 [2021-11-25 20:20:05,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:05,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:20:05,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:05,656 INFO L354 Elim1Store]: treesize reduction 64, result has 24.7 percent of original size [2021-11-25 20:20:05,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 303 treesize of output 289 [2021-11-25 20:20:05,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:20:05,688 INFO L354 Elim1Store]: treesize reduction 35, result has 27.1 percent of original size [2021-11-25 20:20:05,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 294 treesize of output 293 [2021-11-25 20:20:05,872 INFO L354 Elim1Store]: treesize reduction 132, result has 17.0 percent of original size [2021-11-25 20:20:05,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 299 treesize of output 304 [2021-11-25 20:20:05,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:05,998 INFO L354 Elim1Store]: treesize reduction 170, result has 19.4 percent of original size [2021-11-25 20:20:05,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 304 treesize of output 322 [2021-11-25 20:20:06,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:06,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-11-25 20:20:06,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:06,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-11-25 20:20:06,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:06,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2021-11-25 20:20:06,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 20:20:06,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:20:06,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:06,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-11-25 20:20:06,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:06,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-11-25 20:20:06,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:06,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2021-11-25 20:20:06,447 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:20:06,823 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '193#(and (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~t~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:20:06,824 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:20:06,824 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:20:06,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 3] total 5 [2021-11-25 20:20:06,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537276254] [2021-11-25 20:20:06,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:20:06,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:20:06,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:20:06,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:20:06,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-25 20:20:06,827 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:20:06,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:20:06,873 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2021-11-25 20:20:06,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:20:06,874 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-25 20:20:06,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:20:06,875 INFO L225 Difference]: With dead ends: 26 [2021-11-25 20:20:06,875 INFO L226 Difference]: Without dead ends: 17 [2021-11-25 20:20:06,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-25 20:20:06,877 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 2 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:20:06,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 21 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:20:06,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-25 20:20:06,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2021-11-25 20:20:06,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:20:06,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-11-25 20:20:06,882 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12 [2021-11-25 20:20:06,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:20:06,883 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-11-25 20:20:06,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:20:06,883 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-11-25 20:20:06,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-25 20:20:06,884 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:20:06,884 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-25 20:20:06,931 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5412fb5-45c1-4b58-b3cc-47a23d42f205/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-25 20:20:07,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5412fb5-45c1-4b58-b3cc-47a23d42f205/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:20:07,100 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:20:07,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:20:07,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1390509779, now seen corresponding path program 2 times [2021-11-25 20:20:07,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:20:07,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619206599] [2021-11-25 20:20:07,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:20:07,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:20:07,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:20:07,347 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:20:07,347 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:20:07,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619206599] [2021-11-25 20:20:07,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619206599] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:20:07,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351464128] [2021-11-25 20:20:07,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:20:07,348 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:20:07,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5412fb5-45c1-4b58-b3cc-47a23d42f205/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:20:07,350 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5412fb5-45c1-4b58-b3cc-47a23d42f205/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:20:07,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5412fb5-45c1-4b58-b3cc-47a23d42f205/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 20:20:07,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 20:20:07,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:20:07,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-25 20:20:07,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:20:07,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:20:07,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2021-11-25 20:20:07,580 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 20:20:07,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-25 20:20:07,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-25 20:20:07,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:20:07,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:20:07,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 20:20:07,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-11-25 20:20:07,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 20:20:07,756 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:20:07,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:20:07,816 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_100 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~t~0#1.base| v_ArrVal_100) |c_ULTIMATE.start_main_~p~0#1.base|) |c_ULTIMATE.start_main_~p~0#1.offset|) 1)) is different from false [2021-11-25 20:20:07,834 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~t~0#1.base_15| Int) (v_ArrVal_100 (Array Int Int))) (or (= (select (select (store |c_#memory_int| |v_ULTIMATE.start_main_~t~0#1.base_15| v_ArrVal_100) |c_ULTIMATE.start_main_~p~0#1.base|) |c_ULTIMATE.start_main_~p~0#1.offset|) 1) (not (= (select |c_#valid| |v_ULTIMATE.start_main_~t~0#1.base_15|) 0)))) is different from false [2021-11-25 20:20:07,875 INFO L354 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2021-11-25 20:20:07,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 29 [2021-11-25 20:20:07,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-11-25 20:20:07,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 20:20:07,903 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2021-11-25 20:20:07,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351464128] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:20:07,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [822743806] [2021-11-25 20:20:07,908 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 20:20:07,908 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:20:07,908 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:20:07,909 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:20:07,909 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:20:07,990 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 20:20:07,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 41 [2021-11-25 20:20:08,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 20:20:08,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:08,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-11-25 20:20:08,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:08,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-11-25 20:20:08,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:08,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:08,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 28 [2021-11-25 20:20:08,158 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 20:20:08,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2021-11-25 20:20:08,229 INFO L354 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2021-11-25 20:20:08,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2021-11-25 20:20:08,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:08,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 234 treesize of output 222 [2021-11-25 20:20:08,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:08,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 234 treesize of output 222 [2021-11-25 20:20:08,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:20:08,389 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-25 20:20:08,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 232 treesize of output 231 [2021-11-25 20:20:08,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:08,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:20:08,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:20:08,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:08,440 INFO L354 Elim1Store]: treesize reduction 46, result has 31.3 percent of original size [2021-11-25 20:20:08,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 271 treesize of output 257 [2021-11-25 20:20:08,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:20:08,472 INFO L354 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2021-11-25 20:20:08,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 262 treesize of output 261 [2021-11-25 20:20:08,650 INFO L354 Elim1Store]: treesize reduction 132, result has 17.0 percent of original size [2021-11-25 20:20:08,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 321 treesize of output 326 [2021-11-25 20:20:08,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:08,757 INFO L354 Elim1Store]: treesize reduction 170, result has 19.4 percent of original size [2021-11-25 20:20:08,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 326 treesize of output 344 [2021-11-25 20:20:08,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:08,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-11-25 20:20:08,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:08,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-11-25 20:20:08,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:08,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2021-11-25 20:20:08,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 20:20:08,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:20:08,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:08,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-11-25 20:20:08,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:08,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-11-25 20:20:08,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:08,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2021-11-25 20:20:09,166 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:20:09,573 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '344#(and (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~t~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:20:09,573 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:20:09,573 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:20:09,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2021-11-25 20:20:09,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128844822] [2021-11-25 20:20:09,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:20:09,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-25 20:20:09,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:20:09,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-25 20:20:09,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=228, Unknown=2, NotChecked=62, Total=342 [2021-11-25 20:20:09,576 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:20:09,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:20:09,844 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2021-11-25 20:20:09,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 20:20:09,845 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-25 20:20:09,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:20:09,846 INFO L225 Difference]: With dead ends: 23 [2021-11-25 20:20:09,846 INFO L226 Difference]: Without dead ends: 21 [2021-11-25 20:20:09,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=124, Invalid=434, Unknown=2, NotChecked=90, Total=650 [2021-11-25 20:20:09,848 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 24 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:20:09,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 40 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 39 Invalid, 0 Unknown, 22 Unchecked, 0.0s Time] [2021-11-25 20:20:09,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-25 20:20:09,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2021-11-25 20:20:09,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:20:09,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2021-11-25 20:20:09,852 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 15 [2021-11-25 20:20:09,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:20:09,853 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2021-11-25 20:20:09,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:20:09,853 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2021-11-25 20:20:09,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-25 20:20:09,854 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:20:09,854 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2021-11-25 20:20:09,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5412fb5-45c1-4b58-b3cc-47a23d42f205/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 20:20:10,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5412fb5-45c1-4b58-b3cc-47a23d42f205/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:20:10,079 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:20:10,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:20:10,080 INFO L85 PathProgramCache]: Analyzing trace with hash -277946290, now seen corresponding path program 3 times [2021-11-25 20:20:10,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:20:10,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780911870] [2021-11-25 20:20:10,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:20:10,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:20:10,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:20:10,447 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:20:10,447 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:20:10,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780911870] [2021-11-25 20:20:10,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780911870] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:20:10,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318935426] [2021-11-25 20:20:10,448 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 20:20:10,449 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:20:10,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5412fb5-45c1-4b58-b3cc-47a23d42f205/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:20:10,451 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5412fb5-45c1-4b58-b3cc-47a23d42f205/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:20:10,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5412fb5-45c1-4b58-b3cc-47a23d42f205/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 20:20:10,553 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 20:20:10,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:20:10,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-25 20:20:10,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:20:10,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:20:10,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:20:10,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:20:10,646 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 20:20:10,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-25 20:20:10,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2021-11-25 20:20:10,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-11-25 20:20:10,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 23 [2021-11-25 20:20:10,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-25 20:20:10,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:20:10,902 INFO L354 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2021-11-25 20:20:10,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 37 [2021-11-25 20:20:10,911 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-25 20:20:10,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 18 [2021-11-25 20:20:10,918 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:20:10,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:20:11,010 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:20:11,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2021-11-25 20:20:11,018 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:20:11,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2021-11-25 20:20:11,026 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_arrayElimArr_4 (Array Int Int))) (or (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~t~0#1.base| v_arrayElimArr_4) |c_ULTIMATE.start_main_~p~0#1.base|) (+ |c_ULTIMATE.start_main_~p~0#1.offset| 4)) 0) (not (= (select v_arrayElimArr_4 (+ |c_ULTIMATE.start_main_~t~0#1.offset| 4)) |c_ULTIMATE.start_main_~p~0#1.base|)))) (forall ((v_arrayElimArr_3 (Array Int Int))) (or (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~t~0#1.base| v_arrayElimArr_3) |c_ULTIMATE.start_main_~p~0#1.base|) (+ |c_ULTIMATE.start_main_~p~0#1.offset| 4)) 0) (not (= (select v_arrayElimArr_3 (+ |c_ULTIMATE.start_main_~t~0#1.offset| 4)) |c_ULTIMATE.start_main_~p~0#1.offset|))))) is different from false [2021-11-25 20:20:11,194 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:20:11,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 60 [2021-11-25 20:20:11,204 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:20:11,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 60 [2021-11-25 20:20:11,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 61 [2021-11-25 20:20:11,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 62 [2021-11-25 20:20:11,230 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:20:11,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 58 [2021-11-25 20:20:11,239 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:20:11,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 52 [2021-11-25 20:20:11,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-25 20:20:11,434 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2021-11-25 20:20:11,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318935426] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:20:11,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [73536583] [2021-11-25 20:20:11,437 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 20:20:11,438 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:20:11,438 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:20:11,438 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:20:11,439 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:20:11,517 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 20:20:11,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 41 [2021-11-25 20:20:11,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 20:20:11,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:11,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-11-25 20:20:11,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:11,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-11-25 20:20:11,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:11,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:11,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 28 [2021-11-25 20:20:11,662 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 20:20:11,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2021-11-25 20:20:11,711 INFO L354 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2021-11-25 20:20:11,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2021-11-25 20:20:11,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:11,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:20:11,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:20:11,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:11,817 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-25 20:20:11,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 241 treesize of output 227 [2021-11-25 20:20:11,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:11,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 234 treesize of output 222 [2021-11-25 20:20:11,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:20:11,872 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-25 20:20:11,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 232 treesize of output 231 [2021-11-25 20:20:11,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:11,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 264 treesize of output 252 [2021-11-25 20:20:11,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:20:11,917 INFO L354 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2021-11-25 20:20:11,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 262 treesize of output 261 [2021-11-25 20:20:12,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:12,103 INFO L354 Elim1Store]: treesize reduction 162, result has 23.2 percent of original size [2021-11-25 20:20:12,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 326 treesize of output 352 [2021-11-25 20:20:12,126 INFO L354 Elim1Store]: treesize reduction 58, result has 1.7 percent of original size [2021-11-25 20:20:12,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 321 treesize of output 326 [2021-11-25 20:20:12,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:12,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2021-11-25 20:20:12,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:12,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-11-25 20:20:12,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:12,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-11-25 20:20:12,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 20:20:12,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:20:12,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:12,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2021-11-25 20:20:12,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:12,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-11-25 20:20:12,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:12,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-11-25 20:20:12,465 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:20:12,823 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '531#(and (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~t~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:20:12,824 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:20:12,824 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:20:12,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2021-11-25 20:20:12,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551687851] [2021-11-25 20:20:12,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:20:12,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-25 20:20:12,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:20:12,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-25 20:20:12,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=289, Unknown=1, NotChecked=34, Total=380 [2021-11-25 20:20:12,826 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:20:12,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:20:12,935 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2021-11-25 20:20:12,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 20:20:12,937 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-25 20:20:12,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:20:12,938 INFO L225 Difference]: With dead ends: 35 [2021-11-25 20:20:12,938 INFO L226 Difference]: Without dead ends: 23 [2021-11-25 20:20:12,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=63, Invalid=320, Unknown=1, NotChecked=36, Total=420 [2021-11-25 20:20:12,940 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 4 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:20:12,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 89 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 35 Unchecked, 0.1s Time] [2021-11-25 20:20:12,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-25 20:20:12,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2021-11-25 20:20:12,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:20:12,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-11-25 20:20:12,944 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 18 [2021-11-25 20:20:12,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:20:12,945 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-11-25 20:20:12,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:20:12,945 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-11-25 20:20:12,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-25 20:20:12,946 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:20:12,946 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2021-11-25 20:20:12,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5412fb5-45c1-4b58-b3cc-47a23d42f205/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 20:20:13,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5412fb5-45c1-4b58-b3cc-47a23d42f205/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-25 20:20:13,147 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:20:13,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:20:13,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1181271651, now seen corresponding path program 4 times [2021-11-25 20:20:13,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:20:13,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832395159] [2021-11-25 20:20:13,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:20:13,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:20:13,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:20:13,535 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:20:13,536 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:20:13,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832395159] [2021-11-25 20:20:13,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832395159] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:20:13,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099449775] [2021-11-25 20:20:13,536 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 20:20:13,536 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:20:13,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5412fb5-45c1-4b58-b3cc-47a23d42f205/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:20:13,537 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5412fb5-45c1-4b58-b3cc-47a23d42f205/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:20:13,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5412fb5-45c1-4b58-b3cc-47a23d42f205/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 20:20:13,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:20:13,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 63 conjunts are in the unsatisfiable core [2021-11-25 20:20:13,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:20:13,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:20:13,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2021-11-25 20:20:13,743 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 20:20:13,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-25 20:20:13,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-25 20:20:13,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:20:13,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:20:13,924 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-11-25 20:20:13,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2021-11-25 20:20:14,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2021-11-25 20:20:14,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2021-11-25 20:20:14,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 23 [2021-11-25 20:20:14,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2021-11-25 20:20:14,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-25 20:20:14,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:20:14,309 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-25 20:20:14,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 89 treesize of output 49 [2021-11-25 20:20:14,318 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-25 20:20:14,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 18 [2021-11-25 20:20:14,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 20:20:14,345 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:20:14,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:20:14,433 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:20:14,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 42 [2021-11-25 20:20:14,439 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:20:14,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 37 [2021-11-25 20:20:14,472 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_8 (Array Int Int)) (v_ArrVal_261 (Array Int Int)) (v_arrayElimArr_9 (Array Int Int))) (let ((.cse0 (+ |c_ULTIMATE.start_main_~t~0#1.offset| 4))) (or (not (= (select v_arrayElimArr_9 .cse0) |c_ULTIMATE.start_main_~p~0#1.offset|)) (not (= (select v_arrayElimArr_8 .cse0) |c_ULTIMATE.start_main_~p~0#1.base|)) (= (let ((.cse1 (+ |c_ULTIMATE.start_main_~p~0#1.offset| 4))) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~t~0#1.base| v_ArrVal_261) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~t~0#1.base| v_arrayElimArr_8) |c_ULTIMATE.start_main_~p~0#1.base|) .cse1)) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~t~0#1.base| v_arrayElimArr_9) |c_ULTIMATE.start_main_~p~0#1.base|) .cse1))) 1)))) is different from false [2021-11-25 20:20:14,637 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:20:14,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 52 [2021-11-25 20:20:14,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 82 [2021-11-25 20:20:14,694 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:20:14,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 51 [2021-11-25 20:20:14,703 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:20:14,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 64 [2021-11-25 20:20:14,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 94 [2021-11-25 20:20:14,728 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:20:14,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 96 treesize of output 96 [2021-11-25 20:20:15,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 20:20:15,781 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimCell_150 Int) (v_ArrVal_261 (Array Int Int)) (v_ArrVal_253 (Array Int Int)) (|v_ULTIMATE.start_main_~t~0#1.base_25| Int) (v_arrayElimCell_147 Int)) (let ((.cse0 (= |c_ULTIMATE.start_main_~t~0#1.offset| 0)) (.cse2 (= |v_ULTIMATE.start_main_~t~0#1.base_25| |c_ULTIMATE.start_main_~t~0#1.base|)) (.cse1 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~t~0#1.base| v_ArrVal_253) |v_ULTIMATE.start_main_~t~0#1.base_25| v_ArrVal_261))) (or (and (not (= v_arrayElimCell_150 |c_ULTIMATE.start_main_~t~0#1.offset|)) .cse0) (and (= (select (select .cse1 v_arrayElimCell_147) v_arrayElimCell_150) 1) .cse2) (not (= (select |c_#valid| |v_ULTIMATE.start_main_~t~0#1.base_25|) 0)) (and .cse0 (not (= v_arrayElimCell_147 |c_ULTIMATE.start_main_~t~0#1.base|))) (and (not .cse2) (= (select (select .cse1 |c_ULTIMATE.start_main_~p~0#1.base|) |c_ULTIMATE.start_main_~p~0#1.offset|) 1))))) is different from false [2021-11-25 20:20:15,846 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_261 (Array Int Int)) (v_arrayElimCell_147 Int) (v_ArrVal_253 (Array Int Int)) (|v_ULTIMATE.start_main_~t~0#1.base_25| Int)) (or (= (select (select (store (store |c_#memory_int| v_arrayElimCell_147 v_ArrVal_253) |v_ULTIMATE.start_main_~t~0#1.base_25| v_ArrVal_261) |c_ULTIMATE.start_main_~p~0#1.base|) |c_ULTIMATE.start_main_~p~0#1.offset|) 1) (not (= (select (store |c_#valid| v_arrayElimCell_147 1) |v_ULTIMATE.start_main_~t~0#1.base_25|) 0)) (not (= (select |c_#valid| v_arrayElimCell_147) 0)))) is different from false [2021-11-25 20:20:15,895 INFO L354 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2021-11-25 20:20:15,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 32 [2021-11-25 20:20:15,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 52 [2021-11-25 20:20:15,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2021-11-25 20:20:15,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-11-25 20:20:16,044 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2021-11-25 20:20:16,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099449775] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:20:16,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [918928038] [2021-11-25 20:20:16,047 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 20:20:16,047 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:20:16,048 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:20:16,048 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:20:16,048 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:20:16,092 INFO L354 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2021-11-25 20:20:16,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 30 [2021-11-25 20:20:16,125 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 20:20:16,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 41 [2021-11-25 20:20:16,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:16,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-11-25 20:20:16,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:16,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-11-25 20:20:16,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:16,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:16,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 28 [2021-11-25 20:20:16,249 INFO L354 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2021-11-25 20:20:16,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2021-11-25 20:20:16,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2021-11-25 20:20:16,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:16,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 230 treesize of output 218 [2021-11-25 20:20:16,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:16,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 230 treesize of output 218 [2021-11-25 20:20:16,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:16,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:20:16,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:16,378 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-25 20:20:16,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 237 treesize of output 223 [2021-11-25 20:20:16,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:20:16,400 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-25 20:20:16,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 228 treesize of output 227 [2021-11-25 20:20:16,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:20:16,422 INFO L354 Elim1Store]: treesize reduction 35, result has 27.1 percent of original size [2021-11-25 20:20:16,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 294 treesize of output 293 [2021-11-25 20:20:16,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:16,597 INFO L354 Elim1Store]: treesize reduction 162, result has 23.2 percent of original size [2021-11-25 20:20:16,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 304 treesize of output 330 [2021-11-25 20:20:16,619 INFO L354 Elim1Store]: treesize reduction 58, result has 1.7 percent of original size [2021-11-25 20:20:16,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 299 treesize of output 304 [2021-11-25 20:20:16,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:16,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-11-25 20:20:16,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:16,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2021-11-25 20:20:16,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:16,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-11-25 20:20:16,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:20:16,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 20:20:16,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:16,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-11-25 20:20:16,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:16,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-11-25 20:20:16,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:16,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2021-11-25 20:20:16,936 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:20:17,258 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '749#(and (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~t~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:20:17,258 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:20:17,258 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:20:17,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 26 [2021-11-25 20:20:17,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157600060] [2021-11-25 20:20:17,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:20:17,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-25 20:20:17,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:20:17,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-25 20:20:17,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=666, Unknown=3, NotChecked=162, Total=930 [2021-11-25 20:20:17,261 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 26 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:20:17,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:20:17,871 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2021-11-25 20:20:17,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-25 20:20:17,872 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 26 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-25 20:20:17,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:20:17,873 INFO L225 Difference]: With dead ends: 29 [2021-11-25 20:20:17,873 INFO L226 Difference]: Without dead ends: 27 [2021-11-25 20:20:17,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=242, Invalid=1171, Unknown=5, NotChecked=222, Total=1640 [2021-11-25 20:20:17,875 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 23 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:20:17,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 98 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 95 Invalid, 0 Unknown, 55 Unchecked, 0.1s Time] [2021-11-25 20:20:17,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-25 20:20:17,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2021-11-25 20:20:17,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:20:17,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2021-11-25 20:20:17,880 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 21 [2021-11-25 20:20:17,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:20:17,880 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2021-11-25 20:20:17,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 26 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:20:17,881 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2021-11-25 20:20:17,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-25 20:20:17,882 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:20:17,882 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1] [2021-11-25 20:20:17,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5412fb5-45c1-4b58-b3cc-47a23d42f205/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 20:20:18,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5412fb5-45c1-4b58-b3cc-47a23d42f205/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-25 20:20:18,087 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:20:18,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:20:18,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1693471042, now seen corresponding path program 5 times [2021-11-25 20:20:18,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:20:18,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902932926] [2021-11-25 20:20:18,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:20:18,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:20:18,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:20:18,382 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:20:18,382 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:20:18,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902932926] [2021-11-25 20:20:18,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902932926] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:20:18,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959851426] [2021-11-25 20:20:18,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:20:18,383 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:20:18,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5412fb5-45c1-4b58-b3cc-47a23d42f205/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:20:18,384 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5412fb5-45c1-4b58-b3cc-47a23d42f205/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:20:18,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5412fb5-45c1-4b58-b3cc-47a23d42f205/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 20:20:18,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-25 20:20:18,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:20:18,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 71 conjunts are in the unsatisfiable core [2021-11-25 20:20:18,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:20:18,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:20:18,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:20:18,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:20:18,559 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 20:20:18,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-25 20:20:18,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-11-25 20:20:18,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-11-25 20:20:18,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-11-25 20:20:18,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-11-25 20:20:18,700 INFO L354 Elim1Store]: treesize reduction 8, result has 65.2 percent of original size [2021-11-25 20:20:18,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 24 [2021-11-25 20:20:18,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2021-11-25 20:20:18,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2021-11-25 20:20:18,776 INFO L354 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2021-11-25 20:20:18,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 71 treesize of output 67 [2021-11-25 20:20:18,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 46 [2021-11-25 20:20:19,242 INFO L354 Elim1Store]: treesize reduction 80, result has 3.6 percent of original size [2021-11-25 20:20:19,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 182 treesize of output 82 [2021-11-25 20:20:19,254 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-25 20:20:19,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 23 [2021-11-25 20:20:19,263 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:20:19,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:20:19,467 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:20:19,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 44 [2021-11-25 20:20:19,472 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:20:19,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 39 [2021-11-25 20:20:19,490 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:20:19,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 49 [2021-11-25 20:20:19,494 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:20:19,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 39 [2021-11-25 20:20:19,528 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_arrayElimArr_17 (Array Int Int)) (v_arrayElimArr_18 (Array Int Int))) (let ((.cse2 (+ |c_ULTIMATE.start_main_~t~0#1.offset| 4))) (or (= (let ((.cse1 (+ |c_ULTIMATE.start_main_~p~0#1.offset| 4))) (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~t~0#1.base| v_arrayElimArr_17))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~p~0#1.base|) .cse1))) (+ (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~t~0#1.base| v_arrayElimArr_18) |c_ULTIMATE.start_main_~p~0#1.base|) .cse1) 4))) 0) (not (= (select v_arrayElimArr_17 .cse2) |c_ULTIMATE.start_main_~p~0#1.base|)) (not (= (select v_arrayElimArr_18 .cse2) |c_ULTIMATE.start_main_~p~0#1.offset|))))) (forall ((v_arrayElimArr_19 (Array Int Int)) (v_arrayElimArr_20 (Array Int Int))) (let ((.cse3 (+ |c_ULTIMATE.start_main_~t~0#1.offset| 4))) (or (not (= (select v_arrayElimArr_19 .cse3) |c_ULTIMATE.start_main_~p~0#1.base|)) (not (= (select v_arrayElimArr_20 .cse3) |c_ULTIMATE.start_main_~p~0#1.offset|)) (= (let ((.cse4 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~t~0#1.base| v_arrayElimArr_20)) (.cse5 (+ |c_ULTIMATE.start_main_~p~0#1.offset| 4))) (select (select .cse4 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~t~0#1.base| v_arrayElimArr_19) |c_ULTIMATE.start_main_~p~0#1.base|) .cse5)) (+ (select (select .cse4 |c_ULTIMATE.start_main_~p~0#1.base|) .cse5) 4))) 0))))) is different from false [2021-11-25 20:20:19,864 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:20:19,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 129 [2021-11-25 20:20:19,872 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:20:19,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 129 treesize of output 122 [2021-11-25 20:20:22,265 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:20:22,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 74 [2021-11-25 20:20:22,273 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:20:22,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 64 [2021-11-25 20:20:22,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:20:22,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:22,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:22,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 492 treesize of output 426 [2021-11-25 20:20:22,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:20:22,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 264 treesize of output 258 [2021-11-25 20:20:22,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 264 treesize of output 174 [2021-11-25 20:20:22,312 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:20:22,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 180 treesize of output 148 [2021-11-25 20:20:22,324 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:20:22,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 140 treesize of output 132 [2021-11-25 20:20:22,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 109 [2021-11-25 20:20:22,598 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:20:22,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 74 [2021-11-25 20:20:22,606 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:20:22,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 64 [2021-11-25 20:20:22,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:20:22,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:22,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 152 [2021-11-25 20:20:22,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:20:22,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 116 [2021-11-25 20:20:22,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 98 [2021-11-25 20:20:22,635 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:20:22,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 72 [2021-11-25 20:20:22,644 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:20:22,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 67 [2021-11-25 20:20:22,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2021-11-25 20:20:23,553 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 20:20:23,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 18 [2021-11-25 20:20:23,568 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 20:20:23,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 18 [2021-11-25 20:20:23,578 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-11-25 20:20:23,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959851426] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:20:23,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1532297393] [2021-11-25 20:20:23,581 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 20:20:23,581 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:20:23,582 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:20:23,582 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:20:23,582 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:20:23,652 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 20:20:23,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 41 [2021-11-25 20:20:23,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 20:20:23,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:23,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-11-25 20:20:23,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:23,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:23,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 28 [2021-11-25 20:20:23,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:23,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-11-25 20:20:23,790 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 20:20:23,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2021-11-25 20:20:23,857 INFO L354 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2021-11-25 20:20:23,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2021-11-25 20:20:23,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:23,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:20:23,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:23,975 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-25 20:20:23,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 237 treesize of output 223 [2021-11-25 20:20:23,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:23,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 230 treesize of output 218 [2021-11-25 20:20:24,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:20:24,028 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-25 20:20:24,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 228 treesize of output 227 [2021-11-25 20:20:24,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:24,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 296 treesize of output 284 [2021-11-25 20:20:24,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:20:24,073 INFO L354 Elim1Store]: treesize reduction 35, result has 27.1 percent of original size [2021-11-25 20:20:24,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 294 treesize of output 293 [2021-11-25 20:20:24,234 INFO L354 Elim1Store]: treesize reduction 132, result has 17.0 percent of original size [2021-11-25 20:20:24,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 299 treesize of output 304 [2021-11-25 20:20:24,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:24,320 INFO L354 Elim1Store]: treesize reduction 170, result has 19.4 percent of original size [2021-11-25 20:20:24,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 304 treesize of output 322 [2021-11-25 20:20:24,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:24,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2021-11-25 20:20:24,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:24,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-11-25 20:20:24,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:24,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-11-25 20:20:24,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:20:24,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 20:20:24,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:24,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2021-11-25 20:20:24,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:24,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-11-25 20:20:24,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:24,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-11-25 20:20:24,693 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:20:25,060 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1004#(and (<= 0 |#NULL.base|) (<= |#NULL.offset| 0) (<= |#NULL.base| 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2021-11-25 20:20:25,061 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:20:25,061 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:20:25,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2021-11-25 20:20:25,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244610759] [2021-11-25 20:20:25,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:20:25,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-25 20:20:25,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:20:25,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-25 20:20:25,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=667, Unknown=3, NotChecked=52, Total=812 [2021-11-25 20:20:25,063 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:20:25,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:20:25,367 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2021-11-25 20:20:25,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 20:20:25,368 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-25 20:20:25,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:20:25,368 INFO L225 Difference]: With dead ends: 44 [2021-11-25 20:20:25,368 INFO L226 Difference]: Without dead ends: 29 [2021-11-25 20:20:25,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=117, Invalid=876, Unknown=3, NotChecked=60, Total=1056 [2021-11-25 20:20:25,370 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 5 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:20:25,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 145 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 64 Invalid, 0 Unknown, 88 Unchecked, 0.1s Time] [2021-11-25 20:20:25,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-25 20:20:25,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2021-11-25 20:20:25,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:20:25,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-11-25 20:20:25,374 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 24 [2021-11-25 20:20:25,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:20:25,375 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-11-25 20:20:25,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:20:25,375 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-11-25 20:20:25,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-25 20:20:25,376 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:20:25,376 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 1, 1, 1, 1] [2021-11-25 20:20:25,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5412fb5-45c1-4b58-b3cc-47a23d42f205/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 20:20:25,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5412fb5-45c1-4b58-b3cc-47a23d42f205/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:20:25,577 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:20:25,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:20:25,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1130885395, now seen corresponding path program 6 times [2021-11-25 20:20:25,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:20:25,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796600017] [2021-11-25 20:20:25,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:20:25,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:20:25,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:20:26,190 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:20:26,190 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:20:26,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796600017] [2021-11-25 20:20:26,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796600017] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:20:26,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668855973] [2021-11-25 20:20:26,191 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 20:20:26,191 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:20:26,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5412fb5-45c1-4b58-b3cc-47a23d42f205/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:20:26,198 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5412fb5-45c1-4b58-b3cc-47a23d42f205/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:20:26,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5412fb5-45c1-4b58-b3cc-47a23d42f205/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 20:20:26,292 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 20:20:26,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:20:26,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 89 conjunts are in the unsatisfiable core [2021-11-25 20:20:26,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:20:26,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:20:26,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2021-11-25 20:20:26,347 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 20:20:26,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-25 20:20:26,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-25 20:20:26,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:20:26,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:20:26,524 INFO L354 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2021-11-25 20:20:26,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 41 [2021-11-25 20:20:26,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2021-11-25 20:20:26,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-11-25 20:20:26,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2021-11-25 20:20:26,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 43 [2021-11-25 20:20:26,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-25 20:20:26,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:26,752 INFO L354 Elim1Store]: treesize reduction 12, result has 67.6 percent of original size [2021-11-25 20:20:26,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 37 [2021-11-25 20:20:26,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2021-11-25 20:20:26,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-11-25 20:20:26,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:26,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 37 [2021-11-25 20:20:26,857 INFO L354 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2021-11-25 20:20:26,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 97 treesize of output 69 [2021-11-25 20:20:26,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-25 20:20:27,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:20:27,297 INFO L354 Elim1Store]: treesize reduction 79, result has 19.4 percent of original size [2021-11-25 20:20:27,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 180 treesize of output 98 [2021-11-25 20:20:27,315 INFO L354 Elim1Store]: treesize reduction 10, result has 41.2 percent of original size [2021-11-25 20:20:27,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 29 [2021-11-25 20:20:27,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 20:20:27,345 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:20:27,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:20:27,489 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:20:27,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 88 [2021-11-25 20:20:27,498 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:20:27,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 73 [2021-11-25 20:20:27,530 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_29 (Array Int Int)) (v_ArrVal_485 (Array Int Int)) (v_arrayElimArr_30 (Array Int Int))) (let ((.cse0 (+ |c_ULTIMATE.start_main_~t~0#1.offset| 4))) (or (not (= (select v_arrayElimArr_29 .cse0) |c_ULTIMATE.start_main_~p~0#1.base|)) (not (= |c_ULTIMATE.start_main_~p~0#1.offset| (select v_arrayElimArr_30 .cse0))) (= (let ((.cse4 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~t~0#1.base| v_arrayElimArr_30)) (.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~t~0#1.base| v_arrayElimArr_29)) (.cse5 (+ |c_ULTIMATE.start_main_~p~0#1.offset| 4))) (let ((.cse2 (select (select .cse1 |c_ULTIMATE.start_main_~p~0#1.base|) .cse5)) (.cse3 (+ 4 (select (select .cse4 |c_ULTIMATE.start_main_~p~0#1.base|) .cse5)))) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~t~0#1.base| v_ArrVal_485) (select (select .cse1 .cse2) .cse3)) (select (select .cse4 .cse2) .cse3)))) 1)))) is different from false [2021-11-25 20:20:27,681 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:20:27,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 117 [2021-11-25 20:20:27,689 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:20:27,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 102 [2021-11-25 20:20:27,760 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_32 (Array Int Int)) (v_arrayElimArr_29 (Array Int Int)) (|v_ULTIMATE.start_main_~t~0#1.base_37| Int) (v_ArrVal_474 (Array Int Int)) (v_ArrVal_485 (Array Int Int)) (v_arrayElimArr_31 (Array Int Int)) (v_arrayElimArr_30 (Array Int Int))) (let ((.cse1 (select v_arrayElimArr_29 4)) (.cse0 (+ |c_ULTIMATE.start_main_~t~0#1.offset| 4))) (or (not (= (select v_arrayElimArr_31 .cse0) |c_ULTIMATE.start_main_~p~0#1.offset|)) (not (= (select |c_#valid| |v_ULTIMATE.start_main_~t~0#1.base_37|) 0)) (not (= (select v_arrayElimArr_30 4) |c_ULTIMATE.start_main_~t~0#1.offset|)) (not (= .cse1 |c_ULTIMATE.start_main_~t~0#1.base|)) (not (= (select v_arrayElimArr_32 .cse0) |c_ULTIMATE.start_main_~p~0#1.base|)) (= (let ((.cse5 (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~t~0#1.base| v_arrayElimArr_31) |v_ULTIMATE.start_main_~t~0#1.base_37| v_arrayElimArr_30)) (.cse2 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~t~0#1.base| v_arrayElimArr_32) |v_ULTIMATE.start_main_~t~0#1.base_37| v_arrayElimArr_29))) (let ((.cse3 (select (select .cse2 .cse1) .cse0)) (.cse4 (+ 4 (select (select .cse5 .cse1) .cse0)))) (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~t~0#1.base| v_ArrVal_474) |v_ULTIMATE.start_main_~t~0#1.base_37| v_ArrVal_485) (select (select .cse2 .cse3) .cse4)) (select (select .cse5 .cse3) .cse4)))) 1)))) is different from false [2021-11-25 20:20:27,928 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_32 (Array Int Int)) (v_arrayElimArr_29 (Array Int Int)) (|v_ULTIMATE.start_main_~t~0#1.base_37| Int) (v_ArrVal_474 (Array Int Int)) (v_ArrVal_485 (Array Int Int)) (v_arrayElimArr_31 (Array Int Int)) (v_arrayElimArr_30 (Array Int Int))) (let ((.cse1 (select v_arrayElimArr_30 4))) (let ((.cse0 (select v_arrayElimArr_29 4)) (.cse2 (+ .cse1 4))) (or (not (= (select (store |c_#valid| .cse0 1) |v_ULTIMATE.start_main_~t~0#1.base_37|) 0)) (not (= .cse1 0)) (not (= |c_ULTIMATE.start_main_~p~0#1.offset| (select v_arrayElimArr_31 .cse2))) (not (= (select |c_#valid| .cse0) 0)) (= (let ((.cse6 (store (store |c_#memory_$Pointer$.offset| .cse0 v_arrayElimArr_31) |v_ULTIMATE.start_main_~t~0#1.base_37| v_arrayElimArr_30)) (.cse3 (store (store |c_#memory_$Pointer$.base| .cse0 v_arrayElimArr_32) |v_ULTIMATE.start_main_~t~0#1.base_37| v_arrayElimArr_29))) (let ((.cse4 (select (select .cse3 .cse0) .cse2)) (.cse5 (+ (select (select .cse6 .cse0) .cse2) 4))) (select (select (store (store |c_#memory_int| .cse0 v_ArrVal_474) |v_ULTIMATE.start_main_~t~0#1.base_37| v_ArrVal_485) (select (select .cse3 .cse4) .cse5)) (select (select .cse6 .cse4) .cse5)))) 1) (not (= (select v_arrayElimArr_32 .cse2) |c_ULTIMATE.start_main_~p~0#1.base|)))))) is different from false [2021-11-25 20:20:28,117 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:20:28,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 178 treesize of output 159 [2021-11-25 20:20:28,130 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:20:28,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 148 treesize of output 129 [2021-11-25 20:20:28,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:20:28,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:28,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 820 treesize of output 754 [2021-11-25 20:20:28,166 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:20:28,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 769 treesize of output 617 [2021-11-25 20:20:28,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:20:28,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:20:28,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3364 treesize of output 3070 [2021-11-25 20:20:28,236 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:20:28,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 3060 treesize of output 2158 [2021-11-25 20:20:28,284 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:20:28,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 2180 treesize of output 1828 [2021-11-25 20:20:28,339 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:20:28,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1816 treesize of output 1692